Yes.
It is.
I script all the time.
I make Torque games.
I have folders and folders full of mods and some of them have thousands of lines of code.
It won't work, it doesn't work that way. I don't know how exactly to explain it. You can't do that client-sided.
/loaddup and /savedup commands have 1 majour problem- you cant load anything you saved on another server. I dont even think, if it's not your server, you can do anything with it. Then again Rathymos used it on my server. Nevermind. But still, you cant load stuff you saved on another server.
If you host a server and save duplications, they go into a saves folder called Duplications, but they are all in the same position on any map. So you can load them on, say, a slate map on another server and save the duplication there.